﻿///Array methods not supported by IE 8 and old browsers
///Thank you IE!

if (!Array.isArray) {
    Array.isArray = function (arg) {
        return Object.prototype.toString.call(arg) == '[object Array]';
    };
}

if (!Array.prototype.indexOf) {
    Array.prototype.indexOf = function (searchElement /*, fromIndex */) {
        "use strict";
        if (this == null)
            throw new TypeError();
        var t = Object(this);
        var len = t.length >>> 0;
        if (len === 0)
            return -1;
        var n = 0;
        if (arguments.length > 0) {
            n = Number(arguments[1]);
            if (n != n) // shortcut for verifying if it's NaN  
                n = 0;
            else if (n != 0 && n != Infinity && n != -Infinity)
                n = (n > 0 || -1) * Math.floor(Math.abs(n));
        }
        if (n >= len)
            return -1;
        var k = n >= 0 ? n : Math.max(len - Math.abs(n), 0);
        for (; k < len; k++)
            if (k in t && t[k] === searchElement)
                return k;
        return -1;
    };
}

if (!Array.prototype.lastIndexOf) {
    Array.prototype.lastIndexOf = function (searchElement /*, fromIndex*/) {
        "use strict";

        if (this == null)
            throw new TypeError();

        var t = Object(this);
        var len = t.length >>> 0;
        if (len === 0)
            return -1;

        var n = len;
        if (arguments.length > 1) {
            n = Number(arguments[1]);
            if (n != n)
                n = 0;
            else if (n != 0 && n != (1 / 0) && n != -(1 / 0))
                n = (n > 0 || -1) * Math.floor(Math.abs(n));
        }

        var k = n >= 0
          ? Math.min(n, len - 1)
          : len - Math.abs(n);

        for (; k >= 0; k--) {
            if (k in t && t[k] === searchElement)
                return k;
        }
        return -1;
    };
}

if (!Array.prototype.filter) {
    Array.prototype.filter = function (fun /*, thisp */) {
        "use strict";

        if (this == null)
            throw new TypeError();

        var t = Object(this);
        var len = t.length >>> 0;
        if (typeof fun != "function")
            throw new TypeError();

        var res = [];
        var thisp = arguments[1];
        for (var i = 0; i < len; i++) {
            if (i in t) {
                var val = t[i]; // in case fun mutates this  
                if (fun.call(thisp, val, i, t))
                    res.push(val);
            }
        }

        return res;
    };
}

// Production steps of ECMA-262, Edition 5, 15.4.4.18  
// Reference: http://es5.github.com/#x15.4.4.18  
if (!Array.prototype.forEach) {

    Array.prototype.forEach = function (callback, thisArg) {

        var T, k;

        if (this == null) {
            throw new TypeError(" this is null or not defined");
        }

        // 1. Let O be the result of calling ToObject passing the |this| value as the argument.  
        var O = Object(this);

        // 2. Let lenValue be the result of calling the Get internal method of O with the argument "length".  
        // 3. Let len be ToUint32(lenValue).  
        var len = O.length >>> 0; // Hack to convert O.length to a UInt32  

        // 4. If IsCallable(callback) is false, throw a TypeError exception.  
        // See: http://es5.github.com/#x9.11  
        if ({}.toString.call(callback) != "[object Function]") {
            throw new TypeError(callback + " is not a function");
        }

        // 5. If thisArg was supplied, let T be thisArg; else let T be undefined.  
        if (thisArg) {
            T = thisArg;
        }

        // 6. Let k be 0  
        k = 0;

        // 7. Repeat, while k < len  
        while (k < len) {

            var kValue;

            // a. Let Pk be ToString(k).  
            //   This is implicit for LHS operands of the in operator  
            // b. Let kPresent be the result of calling the HasProperty internal method of O with argument Pk.  
            //   This step can be combined with c  
            // c. If kPresent is true, then  
            if (k in O) {

                // i. Let kValue be the result of calling the Get internal method of O with argument Pk.  
                kValue = O[k];

                // ii. Call the Call internal method of callback with T as the this value and  
                // argument list containing kValue, k, and O.  
                callback.call(T, kValue, k, O);
            }
            // d. Increase k by 1.  
            k++;
        }
        // 8. return undefined  
    };
}

// Production steps of ECMA-262, Edition 5, 15.4.4.19  
// Reference: http://es5.github.com/#x15.4.4.19  
if (!Array.prototype.map) {
    Array.prototype.map = function (callback, thisArg) {

        var T, A, k;

        if (this == null) {
            throw new TypeError(" this is null or not defined");
        }

        // 1. Let O be the result of calling ToObject passing the |this| value as the argument.  
        var O = Object(this);

        // 2. Let lenValue be the result of calling the Get internal method of O with the argument "length".  
        // 3. Let len be ToUint32(lenValue).  
        var len = O.length >>> 0;

        // 4. If IsCallable(callback) is false, throw a TypeError exception.  
        // See: http://es5.github.com/#x9.11  
        if ({}.toString.call(callback) != "[object Function]") {
            throw new TypeError(callback + " is not a function");
        }

        // 5. If thisArg was supplied, let T be thisArg; else let T be undefined.  
        if (thisArg) {
            T = thisArg;
        }

        // 6. Let A be a new array created as if by the expression new Array(len) where Array is  
        // the standard built-in constructor with that name and len is the value of len.  
        A = new Array(len);

        // 7. Let k be 0  
        k = 0;

        // 8. Repeat, while k < len  
        while (k < len) {

            var kValue, mappedValue;

            // a. Let Pk be ToString(k).  
            //   This is implicit for LHS operands of the in operator  
            // b. Let kPresent be the result of calling the HasProperty internal method of O with argument Pk.  
            //   This step can be combined with c  
            // c. If kPresent is true, then  
            if (k in O) {

                // i. Let kValue be the result of calling the Get internal method of O with argument Pk.  
                kValue = O[k];

                // ii. Let mappedValue be the result of calling the Call internal method of callback  
                // with T as the this value and argument list containing kValue, k, and O.  
                mappedValue = callback.call(T, kValue, k, O);

                // iii. Call the DefineOwnProperty internal method of A with arguments  
                // Pk, Property Descriptor {Value: mappedValue, Writable: true, Enumerable: true, Configurable: true},  
                // and false.  

                // In browsers that support Object.defineProperty, use the following:  
                // Object.defineProperty(A, Pk, { value: mappedValue, writable: true, enumerable: true, configurable: true });  

                // For best browser support, use the following:  
                A[k] = mappedValue;
            }
            // d. Increase k by 1.  
            k++;
        }

        // 9. return A  
        return A;
    };
}

if (!Array.prototype.some) {
    Array.prototype.some = function (fun /*, thisp */) {
        "use strict";

        if (this == null)
            throw new TypeError();

        var t = Object(this);
        var len = t.length >>> 0;
        if (typeof fun != "function")
            throw new TypeError();

        var thisp = arguments[1];
        for (var i = 0; i < len; i++) {
            if (i in t && fun.call(thisp, t[i], i, t))
                return true;
        }

        return false;
    };
}

if (!Array.prototype.every) {
    Array.prototype.every = function (fun /*, thisp */) {
        "use strict";

        if (this == null)
            throw new TypeError();

        var t = Object(this);
        var len = t.length >>> 0;
        if (typeof fun != "function")
            throw new TypeError();

        var thisp = arguments[1];
        for (var i = 0; i < len; i++) {
            if (i in t && !fun.call(thisp, t[i], i, t))
                return false;
        }

        return true;
    };
}

if (!Array.prototype.addIfNotExists) {
    Array.prototype.addIfNotExists = function (element) {
        if (this.indexOf(element) === -1)
            this.push(element);
    };
};

if (!Array.prototype.remove) {
    Array.prototype.remove = function (element) {
        var index = this.indexOf(element);
        if (index !== -1)
            this.splice(index, 1);
    };
};

if (!Array.prototype.find) {
    Array.prototype.find = function (fun/*, thisp */) {

        var t = Object(this);
        var len = t.length >>> 0;
        var thisp = arguments[1];
        var found = false;
        var element = null;

        for (var i = 0; i < len && !found; i++) {
            element = t[i];
            found = fun.call(thisp, element, i, t);
        }

        return found ? element : null;
    };
};

if (!Array.prototype.contains) {
    Array.prototype.contains = function (element) {
        return this.indexOf(element) > -1;        
    };
};

if (!Array.prototype.getById) {
    Array.prototype.getById = function (id) {
        return this.find(function (el) {
            return el.Id === id || el.id === id;
        });
    };
};

if (!Array.prototype.deleteById) {
    Array.prototype.deleteById = function (id) {
        var index = -1;
        this.find(function (el, i) {
            var found = el.Id === id || el.id === id;
            if (found)
                index = i;
            return found;
        });
        
        if (index >= 0)
            this.splice(index, 1);
    };
};

if (!Array.prototype.last) {
    Array.prototype.last = function () {
        return this[this.length - 1];        
    };
};